How to use Type Alias In Typescript
Type aliasing in TypeScript allows developers to create custom named types, including those for function return values. This approach provides clarity and reusability when specifying the return type of functions.
Example:
type Result = {
value: number;
};
function generateResult(): Result {
return { value: 22 };
}
const result: Result = generateResult();
console.log(result.value); // Output: 22
Output:
22
How to Strongly Type the Return Value of any Function in TypeScript ?
Specifying the return type after a function’s parameters with a colon ensures a consistent return value type. This enhances code reliability by enforcing expected return types. It is a fundamental feature of TypeScript that ensures functions consistently produce values of the specified type. The below methods can be used to achieve this task:
Table of Content
- Directly specifying the return type
- Using Generic type
- Using TypeScript Interfaces